Merge pull request #42832 from lulalala/slim-errors-inspect

Slimmer ActiveModel::Errors#inspect message

activemodel/CHANGELOG.md

@@ -39,5 +39,8 @@
 
     *Lukas Pokorny*
 
+*   Make ActiveModel::Errors#inspect slimmer for readability
+
+    *lulalala*
 
 Please check [6-1-stable](https://github.com/rails/rails/blob/6-1-stable/activemodel/CHANGELOG.md) for previous changes.

activemodel/lib/active_model/errors.rb

@@ -571,6 +571,12 @@ module ActiveModel
       add_from_legacy_details_hash(data["details"]) if data.key?("details")
     end
 
+    def inspect # :nodoc:
+      inspection = @errors.inspect
+
+      "#<#{self.class.name} #{inspection}>"
+    end
+
     private
       def normalize_arguments(attribute, type, **options)
         # Evaluate proc first

activemodel/test/cases/errors_test.rb

@@ -880,4 +880,11 @@ class ErrorsTest < ActiveModel::TestCase
     assert_equal({}, errors.messages)
     assert_equal({}, errors.details)
   end
+
+  test "inspect" do
+    errors = ActiveModel::Errors.new(Person.new)
+    errors.add(:base)
+
+    assert_equal(%(#<ActiveModel::Errors [#{errors.first.inspect}]>), errors.inspect)
+  end
 end